package com.zkb.common.utils.security;

import javax.crypto.KeyGenerator;
import java.security.Key;
import java.security.NoSuchAlgorithmException;

/**
 * 对称密钥密码算法工具类
 *
 * @author KingPrimes
 */
public class CipherUtils {
    /**
     * 生成随机秘钥
     *
     * @param keyBitSize    字节大小
     * @param algorithmName 算法名称
     * @return 创建密匙
     */
    public static Key generateNewKey(int keyBitSize, String algorithmName) {
        KeyGenerator kg;
        try {
            kg = KeyGenerator.getInstance(algorithmName);
        } catch (NoSuchAlgorithmException e) {
            String msg = "Unable to acquire " + algorithmName + " algorithm.  This is required to function.";
            throw new IllegalStateException(msg, e);
        }
        kg.init(keyBitSize);
        return kg.generateKey();
    }
}
